High
04/05/06/08 on Chaffoteaux Serelia 24 MFFI

Your boiler is struggling to move hot water around the system effectively, which is causing it to overheat and shut itself down as a safety precaution.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Temperature rise (Check main exchanger or 3 way valve)

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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